---
name: "libevdev-tweak-device"
section: "1"
platform: "linux"
package: "libevdev"
version: "1.14.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/libevdev-tweak-device"
---

# libevdev-tweak-device(1)

modify an evdev kernel device

## NAME

libevdev-tweak-device - modify an evdev kernel device

## SYNOPSIS

**libevdev-tweak-device** --abs ABS\_X \[--min a\] \[--max b\] \[--res c\] \[--fuzz d\] \[--flat e\] /dev/input/eventX **libevdev-tweak-device** --resolution res\[,yres\] /dev/input/eventX

**libevdev-tweak-device** --led LED\_NUML --on\|--off /dev/input/eventX

## DESCRIPTION

The *libevdev-tweak-device* tool changes the properties of the evdev kernel device at */dev/input/eventX.* Currently this may be used to force an LED on or off, or to change the properties of an absolute axis (e.g. its minimum/maximum range or resolution). Changes are permanent until the device is removed.

## OPTIONS

### Changing absolute axes

- **--abs axis**

  Change the given named ABS\_ kernel axis, e.g. ABS\_X. For a full list, see linux/input.h. Each of the options **min, max, res, fuzz, flat** may be given.

- **--min v**

  Set the absinfo minimum to the value v

- **--max v**

  Set the absinfo maximum to the value v

- **--res v**

  Set the absinfo resolution to the value v

- **--fuzz v**

  Set the absinfo fuzz to the value v

- **--flat v**

  Set the absinfo flat to the value v

### Changing the x/y resolution

- **--resolution res\[,yres\]**

  Changes the resolution of the ABS\_X, ABS\_MT\_POSITION\_X, ABS\_Y, and ABS\_MT\_POSITION\_Y axis to the given resolution. If only one resolution value is provided, both x and y axis are set to the same resolution, otherwise the first resolution value is applied to the x axes and the second value to the y axes.

### Toggling LEDs

- **--led led**

  Change the given LED, e.g. LED\_NUML. For a full list, see linux/input.h.

- **--on**

  Change the LED state to on

- **--off**

  Change the LED state to off

## NOTES

The kernel does not notify processes about absinfo property changes. Any process that has previously obtained the absinfo from the device will remain on the old information. This makes using this tool potentially racy, use with caution.